From 2ff7354fe888f46f6629b57e463b0a1eb956c02b Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Tue, 27 Feb 2007 00:27:41 -0700 Subject: [PATCH] [PATCH] x86_64/i386 irq: Fix !CONFIG_SMP compilation When removing set_native_irq I missed the fact that it was called in a couple of places that were compiled even when SMP support is disabled. And since the irq_desc[].affinity field only exists in SMP things broke. Thanks to Simon Arlott for spotting this. There are a couple of ways to fix this but the simplest one is to just remove the assignments. The affinity field is only used to display a value to the user, and nothing on either i386 or x86_64 reads it or depends on it being any particlua value, so skipping the assignment is safe. The assignment that is being removed is just for the initial affinity value before the user explicitly sets it. The irq_desc array initializes this field to CPU_MASK_ALL so the field is initialized to a reasonable value in the SMP case without being set. Signed-off-by: Eric W. Biederman Signed-off-by: Linus Torvalds --- arch/i386/kernel/io_apic.c | 2 -- arch/x86_64/kernel/io_apic.c | 4 ---- 2 files changed, 6 deletions(-) diff --git a/arch/i386/kernel/io_apic.c b/arch/i386/kernel/io_apic.c index 6fec4dab70b..e4408ff4e67 100644 --- a/arch/i386/kernel/io_apic.c +++ b/arch/i386/kernel/io_apic.c @@ -1354,7 +1354,6 @@ static void __init setup_IO_APIC_irqs(void) } spin_lock_irqsave(&ioapic_lock, flags); __ioapic_write_entry(apic, pin, entry); - irq_desc[irq].affinity = TARGET_CPUS; spin_unlock_irqrestore(&ioapic_lock, flags); } } @@ -2875,7 +2874,6 @@ int io_apic_set_pci_routing (int ioapic, int pin, int irq, int edge_level, int a spin_lock_irqsave(&ioapic_lock, flags); __ioapic_write_entry(ioapic, pin, entry); - irq_desc[irq].affinity = TARGET_CPUS; spin_unlock_irqrestore(&ioapic_lock, flags); return 0; diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c index 48593f6b708..0a91368f8b6 100644 --- a/arch/x86_64/kernel/io_apic.c +++ b/arch/x86_64/kernel/io_apic.c @@ -830,10 +830,6 @@ static void setup_IO_APIC_irq(int apic, int pin, unsigned int irq, disable_8259A_irq(irq); ioapic_write_entry(apic, pin, entry); - - spin_lock_irqsave(&ioapic_lock, flags); - irq_desc[irq].affinity = TARGET_CPUS; - spin_unlock_irqrestore(&ioapic_lock, flags); } static void __init setup_IO_APIC_irqs(void) -- 2.20.1